Bosch rexroth A21VG 10 Series - Inspection; Maintenance

44/56 Maintenance and repair
Bosch Rexroth Corporation, A21VG Series 10, RE 93223-01-B/09.2020
10.2 Inspection
In order to enable long and reliable operation of the axial piston unit, Bosch
Rexroth recommends testing the hydraulic system and axial piston unit on a
regular basis, and documenting and archiving the following operating conditions:
Table 12: Inspection schedule
Task to be carried out Interval
Hydraulic
system
Check level of hydraulic uid in the reservoir. Daily
Check the operating temperature at a comparable load
condition at the reservoir port and in the reservoir.
Weekly
Conduct analysis of hydraulic uid: viscosity, aging and
dirt contamination
Yearly or
every 2000
operatinghours
(whichever occurs
rst)
Axial piston
unit
Check axial piston unit for leakage.
Early detection of hydraulic uid loss can help to nd
faults on the machine/system and to rectify them.
For this reason, Bosch Rexroth recommends that the
axial piston unit and system are always kept in a clean
condition.
Daily
Check axial piston unit for unusual noise development. Daily
Check fastener elements for tight seating.
All fasteners have to be checked when the hydraulic
system is switched off, depressurized and cooled down.
Monthly
10.3 Maintenance
The axial piston unit islow-maintenance when used asintended.
The service life oftheaxial piston unit isheavily dependent onthe quality
ofthehydraulic uid. This iswhy we recommend changing thehydraulic
uid atleast once per year orevery 2000 operating hours (whichever occurs
rst), orhaving itanalyzed bythehydraulic uid manufacturer oralaboratory
todetermine its suitability for further use.
The service life oftheaxial piston unit islimited tothe service life ofthebearings
used. You can ask your local contact person about service life based onload cycle.
You can nd their contact information at
www.boschrexroth-us.com/contactus
Based on these details, amaintenance interval should be determined by the
system manufacturer for thereplacement ofthebearings and included in the
maintenance schedule ofthehydraulic system